Release v0.4.0-beta.7

What's Changed

• chore(deps): update dependency macos to v26 by @renovate[bot] in #950
• feat(ir): complete the draft Ion codec and write v3 Ion trees by @DamianReeves in #972
• docs(agents): commit authorship is not a review finding by @DamianReeves in #974
• docs(ir): draft portable node-address contract by @DamianReeves in #973
• docs(ir): record Ion attributes, annotations and document literals by @DamianReeves in #977
• feat!: capability statements become capability claim sets by @DamianReeves in #979
• feat(cli): offer one host identity and MEP version list to every extension by @DamianReeves in #982
• feat: add V3/V4 decorator sidecars and node-address MCK by @DamianReeves in #980
• test(mck): cover V3/V4 node address boundaries by @DamianReeves in #985
• fix(cli): check a describe answer against version-1 claims like a session by @DamianReeves in #984
• feat(ir)!: IR 3.1.0 — v3 Specs and v3 JSON/YAML document trees by @DamianReeves in #986
• test(cli): execute supported migrate steel-thread scenarios by @DamianReeves in #975
• chore: prepare v0.4.0-beta.7 release by @DamianReeves in #988

Full Changelog: v0.4.0-beta.6...v0.4.0-beta.7